using System.Text;

namespace MkvPropEditWrapper.MkvInfo.Reader;

public class MkvProperty : MkvNode
{
    private static class KnownProperties
    {
        public const string TrackType = "Track type";
        public const string TrackNumber = "Track number";
        public const string FlagDefault = "\"Default track\" flag";
        public const string FlagForced = "\"Forced display\" flag";
        public const string Language = "Language";
    }

    public override NodeType NodeType => NodeType.Property;
    public PropertyType PropertyType { get; }
    public ReadOnlyMemory<char> Value { get; }

    public MkvProperty(MkvNode? parent, ReadOnlyMemory<char> name, ReadOnlyMemory<char> value)
        : base(parent, name)
    {
        Value = value;

        PropertyType = FindPropertyType(name);
    }

    private static PropertyType FindPropertyType(ReadOnlyMemory<char> name)
    {
        var span = name.Span;
        
        if (span.SequenceEqual(KnownProperties.TrackType))
        {
            return PropertyType.TrackType;
        }
        
        if (span.SequenceEqual(KnownProperties.TrackNumber))
        {
            return PropertyType.TrackNumber;
        }

        if (span.SequenceEqual(KnownProperties.FlagDefault))
        {
            return PropertyType.FlagDefault;
        }

        if (span.SequenceEqual(KnownProperties.FlagForced))
        {
            return PropertyType.FlagForced;
        }

        if (span.SequenceEqual(KnownProperties.Language))
        {
            return PropertyType.Language;
        }

        return PropertyType.Unknown;
    }

    protected override void AppendSelf(StringBuilder builder)
    {
        builder.AppendLine($"{new string('-', Depth)}> [{NodeType}] {Name}: {Value}");
    }
}